Folding step ladder

Abstract

The utility model relates to a folding type pedal ladder, it includes fixed ladder, fixed block, movable ladder, special-shaped pin shaft and baffle, is fixed with fixed block respectively in the top rear side of two vertical rods of fixed ladder, has the foldable movable ladder through special-shaped pin shaft swing joint in the middle part of fixed ladder, is fixed with baffle respectively vertically in the both sides of the bottom of fixed ladder behind movable ladder, when movable ladder unfolds, the board surface of movable ladder and baffle abuts, is opened in the top of two vertical rods of fixed ladder along the left and right direction respectively and is passed through and has been connected the slot, two joint slots are opposite settings, when movable ladder is completely folded, the crosspiece of movable ladder is placed in the joint slot.

Description

Technical Field

[0001] This utility model relates to the field of bicycle ladder technology, specifically to a folding bicycle ladder. Background Technology

[0002] The cargo boxes of transport vehicles are quite high off the ground, making it difficult to climb in and out of the cargo boxes to inspect the goods. Currently, staff first lift and attach the ladder to the cargo box door, inspect the goods, close the cargo box door, and then move the ladder away from the cargo box. Traditional ladders have a complex structure, are large in size, are difficult to lift, and unstable connections may cause staff to slip or fall, making them inconvenient to use. In addition, the edges of the cargo box are not protected and are prone to collisions. Utility Model Content

[0003] The purpose of this utility model is to provide a folding bicycle ladder.

[0004] The purpose of this utility model is achieved by the following technical solution: a folding bicycle ladder, comprising a fixed ladder, a fixed block, a movable ladder, a special-shaped pin, and baffles; the fixed block is fixed to the top rear side of the two vertical rods of the fixed ladder respectively; the movable ladder is movably connected to the middle of the fixed ladder through the special-shaped pin; the baffles are vertically fixed to both sides of the bottom of the fixed ladder behind the movable ladder; when the movable ladder is unfolded, the movable ladder abuts against the surface of the baffles; the top ends of the two vertical rods of the fixed ladder are respectively provided with locking grooves, the two locking grooves are arranged opposite each other; when the movable ladder is fully folded, the crossbar of the movable ladder is placed in the locking groove.

[0005] Preferably, a slide rail is provided in the middle of the two vertical bars of the fixed ladder, and two oppositely arranged irregular pins are passed through the top of the two vertical bars of the movable ladder. One end of each irregular pin is rotatably connected to the corresponding vertical bar on the movable ladder, and the other end is slidably connected to the corresponding slide rail on the fixed ladder.

[0006] Preferably, foldable handrails are installed on the top front side of the two vertical bars of the fixed ladder.

[0007] Preferably, the handrail includes a fixed shaft and a handrail body; mounting grooves are respectively provided vertically on the top front side of the two vertical bars of the fixed ladder, magnets are fixed on the top inner wall of the mounting grooves, the fixed shaft is horizontally fixed on the bottom inner wall of the mounting grooves, the bottom of the handrail body is rotatably sleeved on the fixed shaft, and the top of the handrail body is movably placed in the mounting grooves. When the handrail body is placed in the mounting grooves, the top of the handrail body is attracted and fixed to the magnets.

[0008] Preferably, a limiting plate is vertically fixed at the bottom opening of the mounting groove, and the top of the limiting plate is provided with a first inclined surface that fits against the front side of the handrail body.

[0009] Preferably, a second inclined surface is provided on the front side of the magnet, which fits against the rear side of the armrest body.

[0010] Preferably, the longitudinal section of the fixing block is a right-angled triangle.

[0011] The advantages of this utility model are as follows: First, this utility model includes a fixed ladder and a movable ladder. The movable ladder is movably connected to the fixed ladder via a special-shaped pin. The movable ladder can be folded and snapped into the snap-fit ​​groove of the fixed ladder. When the movable ladder needs to be unfolded, pull the movable ladder upwards, causing the special-shaped pin to move upwards along the slide. When the bottom of the movable ladder is higher than the top of the baffle, pull the movable ladder forward, causing it to rotate around the special-shaped pin, thereby unfolding the movable ladder. During the unfolding process, pull the movable ladder downwards, causing the special-shaped pin to move downwards along the slide to the bottom. Then, rotate the movable ladder to the bottom of the fixed ladder, extending the length of the fixed ladder to facilitate workers climbing the ladder into the cargo box. After the workers have finished their inspection and disembarked, push the movable ladder upwards, causing the shaped pin to move upwards along the slide. When the bottom of the movable ladder is higher than the top of the baffle, pull the movable ladder forward, causing it to rotate around the shaped pin until it is folded above the fixed ladder. Then, push the movable ladder downwards, causing the shaped pin to move downwards along the slide until the crossbar of the movable ladder engages in the engagement slot of the fixed ladder, completing the folding process.

[0012] Secondly, this utility model is equipped with a foldable handrail. When inspecting goods in and out of the cargo box, unfolding the handrail can provide lateral support to prevent people from slipping and falling, thus improving safety. When the transport vehicle is in motion, folding the handrail can prevent it from scraping other vehicles due to the handrail protruding from the outside of the cargo box, thus ensuring the safe driving of the vehicle. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 yes Figure 1 The left view.

[0016] Figure 3 yes Figure 2A magnified view of part A in the image.

[0017] Figure 4 This is a diagram showing the handrail in its open position.

[0018] Figure 5 This is a schematic diagram of the movable ladder after it has been folded.

[0019] Figure 6 This is a structural diagram of an irregularly shaped pin.

[0020] The components in the attached diagram are labeled as follows: fixed ladder 1, slide 1.1, snap-fit ​​groove 1.2, mounting groove 1.3, fixing block 2, movable ladder 3, special-shaped pin 4, baffle 5, handrail 6, fixed shaft 6.1, handrail body 6.2, magnet 7, first inclined surface 7.1, limiting plate 8, second inclined surface 8.1. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] like Figures 1-6 As shown, a folding bicycle ladder includes a fixed ladder 1, a fixed block 2, a movable ladder 3, a special-shaped pin 4, a baffle 5, and a handrail 6.

[0024] A foldable movable ladder 3 is movably connected to the two vertical bars of the fixed ladder 1 on their opposite outer sides via a special-shaped pin 4. After folding, the movable ladder 3 occupies little space and is easy to install and fix at the bottom of the cargo box. The connection method is as follows: a vertical slide rail 1.1 is opened through the middle section of the two vertical bars of the fixed ladder 1. A special-shaped pin 4 is slidably connected in each slide rail 1.1. The end of each special-shaped pin 4 passes through the slide rail 1.1 and is rotatably connected to the corresponding vertical bar of the movable ladder 3. The special-shaped pin 4 is set to connect the fixed ladder 1 and the movable ladder 3. The slide rail 1.1 is set to facilitate the vertical movement of the special-shaped pin 4, so that the movable ladder 3 can move up and down relative to the fixed ladder 1. The movable ladder 3 can also rotate around the special-shaped pin 4, so that the movable ladder 3 can be unfolded or folded.

[0025] Fixing blocks 2 with right-angled triangular cross sections are fixed to the top rear side of the two vertical bars of the fixed ladder 1. The fixing blocks 2 are installed on the bottom box of the cargo box door by passing through bolts, so that the fixed ladder 1 is installed below the cargo box door. The fixing blocks 2 with right-angled triangular cross sections can enhance the installation stability.

[0026] Two vertical baffles 5 are fixed on both sides of the bottom of the fixed ladder 1 behind the movable ladder 3. When the movable ladder 3 is unfolded, the movable ladder 3 and the baffle 5 abut against each other. When the workers step on the movable ladder to climb, the baffle 5 provides effective support for the movable ladder 3, enhances the stability of the ladder, and prevents the movable ladder 3 from shaking due to force after it is unfolded and extended, thus ensuring the safety of the workers.

[0027] The top of each of the two vertical bars of the fixed ladder 1 is provided with a snap-fit ​​groove 1.2. The two snap-fit ​​grooves 1.2 are arranged opposite to each other. When the movable ladder 3 is completely folded, the horizontal bar of the movable ladder 3 is placed in the snap-fit ​​groove 1.2. The folded movable ladder 3 is snapped and fixed by the snap-fit ​​groove 1.2, which helps to reduce the volume of the treadmill ladder and prevent the movable ladder 3 from swinging and injuring people during vehicle operation.

[0028] Foldable handrails 6 are installed on the top front sides of the two vertical bars of the fixed ladder 1. When inspecting goods in and out of the cargo box, unfolding the handrails 6 provides lateral support to prevent people from slipping and falling, thus improving safety. When the transport vehicle is in motion, folding the handrails 6 can prevent them from scraping other vehicles due to protruding from the cargo box, ensuring safe driving. The handrail 6 includes a fixed shaft 6.1 and a handrail body 6.2. Mounting grooves 1.3 are vertically opened on the top front sides of the two vertical bars of the fixed ladder 1. A mounting plate is fixed on the top inner wall of the mounting groove 1.3. A magnet 7 is horizontally fixed to a fixing shaft 6.1 on the bottom inner wall of the mounting groove 1.3. The bottom of the handrail body 6.2 is rotatably sleeved on the fixing shaft 6.1, and the top of the handrail body 6.2 can be movably placed in the mounting groove 1.3. When the handrail body 6.2 is placed in the mounting groove 1.3, the top of the handrail body 6.2 is attracted and fixed to the magnet 7. The handrail body 6.2 can rotate around the fixing shaft 6.1. When the handrail body 6.2 rotates to be completely inserted into the mounting groove 1.3, the handrail body 6.2 is fixed by the magnet 7, realizing the folding and fixing of the handrail 6.

[0029] A first inclined surface 7.1 is provided on the front side of the magnet 7, which fits against the rear side of the handrail body 6.2. When the handrail body 6.2 is folded, it rotates completely into the mounting groove 1.3, and the handrail body 6.2 is attracted and fixed to the first inclined surface 7.1 of the magnet 7. A limiting plate 8 is vertically fixed at the bottom opening of the mounting groove 1.3, and a second inclined surface 8.1 is provided on the top of the limiting plate 8, which fits against the front side of the handrail body 6.2. When the handrail body 6.2 is unfolded, the second inclined surface 8.1 provides support for the handrail body 6.2, so that the handrail body 6.2 is arranged obliquely upward, making it easier for operators to use for leverage.

[0030] Usage: When the treadmill ladder is in the folded state, the operator first pushes the movable ladder 3 upwards to disengage it from the locking groove 1.2. Next, the operator rotates the movable ladder 3 around the shaped pin 4 to unfold it, while simultaneously pulling the movable ladder 3 downwards, causing the shaped pin 4 to move down the slide rail 1.1. This allows the movable ladder 3 to move downwards relative to the fixed ladder 1 until the movable ladder 3 is unfolded to 180° and its two vertical rods abut against the baffle 5. Then, the operator removes the handrail body 6.2 from the mounting groove 1.3. The bottom of the handrail body 6.2 abuts against the limiting plate 8. The handrail body 6.2 is tilted upward to facilitate the operator's grip and leverage. After the operator enters the cargo box through the step ladder to inspect the goods, the operator closes the cargo box door. The operator first rotates the movable ladder 3 around the special-shaped pin 4 and folds it back, while pushing the movable ladder 3 upward until the crossbar of the movable ladder 3 is locked in the locking groove 1.2. Finally, the handrail body 6.2 is pushed back into the mounting groove 1.3 so that the handrail body 6.2 is attracted to the magnet 7.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A folding bicycle ladder, characterized in that, It includes a fixed ladder, fixed blocks, a movable ladder, a special-shaped pin, and baffles; the fixed blocks are fixed to the top rear sides of the two vertical bars of the fixed ladder respectively; the movable ladder is movably connected to the middle of the fixed ladder through the special-shaped pin; the baffles are vertically fixed to both sides of the bottom of the fixed ladder behind the movable ladder; when the movable ladder is unfolded, the movable ladder abuts against the surface of the baffles; the top ends of the two vertical bars of the fixed ladder are respectively provided with locking grooves, and the two locking grooves are arranged opposite each other; when the movable ladder is fully folded, the crossbar of the movable ladder is placed in the locking groove.

2. A folding bicycle ladder according to claim 1, characterized in that, Slide tracks are provided in the middle of the two vertical bars of the fixed ladder. Two irregularly shaped pins are provided at the top of the two vertical bars of the movable ladder. One end of each irregularly shaped pin is rotatably connected to the corresponding vertical bar on the movable ladder, and the other end is slidably connected to the corresponding slide track on the fixed ladder.

3. A folding bicycle ladder according to claim 1 or 2, characterized in that, Foldable handrails are installed on the top front side of the two vertical bars of the fixed ladder.

4. A folding bicycle ladder according to claim 3, characterized in that, The handrail includes a fixed shaft and a handrail body; mounting grooves are respectively provided vertically on the front top of the two vertical bars of the fixed ladder, magnets are fixed on the inner top wall of the mounting grooves, and the fixed shaft is horizontally fixed on the inner bottom wall of the mounting grooves. The bottom of the handrail body is rotatably sleeved on the fixed shaft, and the top of the handrail body is movably placed in the mounting grooves. When the handrail body is placed in the mounting grooves, the top of the handrail body is attracted and fixed to the magnets.

5. A folding bicycle ladder according to claim 4, characterized in that, A limiting plate is vertically fixed at the bottom opening of the mounting groove, and the top of the limiting plate is provided with a first inclined surface that fits against the front side of the handrail body.

6. A folding bicycle ladder according to claim 4 or 5, characterized in that, A second inclined surface is provided on the front side of the magnet, which fits against the rear side of the armrest body.

7. A folding bicycle ladder according to claim 1, characterized in that, The longitudinal section of the fixing block is a right-angled triangle.

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